écart de trou
- Domaine
-
- imprimerie préparation de la copie
- Date
Terme :
- écart de trou n. m.
Terme associé :
- écart de la trame n. m.
Traductions
-
anglais
Date :Définition
((...)) separation or space between the surface of a glass halftone screen of specific ruling and the photographic surface during the halftone camera exposure.
Notes :
This distance permits the rays of light passing through the screen to diffuse before striking the film or plate. Extent of diffusion of rays is in proportion to their intensity which in turn is determined by the reflection of light from the original copy.
The variation in diffusion is what produces dots of different sizes on the film or plate.Termes :
- screen distance
- screen separation